CV 251 then AC 8478 at O'Hare
Anchorage → Chicago → Montréal
Timetable, Chicago time
19:00CV 251 from Anchorage at the gate
07:05AC 8478 to Montréal leaves the gate
12 h 05 apart on the timetable, overnight
AC 8478 leaves 12 h 05 after CV 251 arrives on the timetable: more than half a day, so not a connection we count.